Easy. An egg and a sperm is needed for fertilization, and due to processes during meiosis that produce genetic variation, the eggs and sperm produced are not genetically identical. (the processes are crossing over and individual assortment)
These puppies are not identical to each other; each puppy starts as a separate egg, fertilised separately and develops with its own placenta. In fact, identical twin puppies are very rare. And from the above, you'd know that each egg and sperm are not the same.
The dogs are all from different sperm and eggs. Each sperm and egg is a product of a unique process of mitosis and meosis. In this process the feticide material of the parents is each cut into half of the parents total chromosome number in unique genetic recombinations. No 2 eggs or sperm will be alike so no two puppies will be alike either unless the are identical twins.(from same egg/sperm)
All living things are a compilation of all the genetic material which came before them. So each puppy has some genetic traits from many, many dog parents going back many, many years. When they are born, some have one set of genetic code, others slightly different sets. So they are different, like everything and everyone born.
Comments
Easy. An egg and a sperm is needed for fertilization, and due to processes during meiosis that produce genetic variation, the eggs and sperm produced are not genetically identical. (the processes are crossing over and individual assortment)
These puppies are not identical to each other; each puppy starts as a separate egg, fertilised separately and develops with its own placenta. In fact, identical twin puppies are very rare. And from the above, you'd know that each egg and sperm are not the same.
Hope this helped to clear things up.
Simple.......siblings,NOT clones!
One egg,one sperm=one fetus...all different
The dogs are all from different sperm and eggs. Each sperm and egg is a product of a unique process of mitosis and meosis. In this process the feticide material of the parents is each cut into half of the parents total chromosome number in unique genetic recombinations. No 2 eggs or sperm will be alike so no two puppies will be alike either unless the are identical twins.(from same egg/sperm)
All living things are a compilation of all the genetic material which came before them. So each puppy has some genetic traits from many, many dog parents going back many, many years. When they are born, some have one set of genetic code, others slightly different sets. So they are different, like everything and everyone born.